Product Info

HOMO treatment forms a corrosion-resistant Fe₃O₄ layer using high-temperature steam—without chemicals or dimensional distortion. It's ideal for precision steel parts requiring clean, eco-friendly protection.

What is Steam Oxide Film Treatment (HOMO Treatment)?
Steam oxide film treatment, or HOMO (Hydrothermal Oxidation Metal Oxide), is a surface treatment process where saturated steam reacts with steel surfaces at 300–600°C to form a dense, stable magnetite (Fe₃O₄) layer.
Unlike plating or black oxide methods, HOMO does not involve chemicals, wastewater, or significant dimensional change. It's increasingly used in industries requiring environmental sustainability and tight tolerances.

How the Magnetite Layer Forms and Works
The Fe₃O₄ layer forms through oxidation when high-temperature steam contacts hot steel. Its characteristics include:
- Thickness: 1–2 microns
- Color: Black to dark gray with a semi-gloss finish
- Stability: Resistant to corrosion in air, humidity, and mildly acidic environments
- Durability: Adheres well and resists peeling better than traditional black oxide
Combined with anti-rust oil, it can endure outdoor storage and transport without degradation.

Advantages Over Other Surface Treatments
- No chemical waste: No need for wastewater treatment or post-wash
- Dimensional precision: Maintains original tolerances—ideal for machined parts
- Eco-friendly: Zero toxic discharge supports green manufacturing
- Stronger adhesion: More durable than black oxide, with less risk of peeling
- Lower total cost: Reduces post-processing and cleaning steps
Compared to zinc plating, HOMO does not provide sacrificial protection but is superior in film stability and appearance.

Process Conditions and Suitable Applications
Standard Processing Range:
- Temperature: 350–500°C
- Duration: 20–90 minutes
- Equipment: Pressurized or continuous steam furnaces

Compatible Materials:
- Carbon steel
- Alloy steel
- Sintered iron-based metals
(Not suitable for stainless steel or aluminum)

Common Applications:
- Precision components: Gears, shafts, and bearings
- Tooling: Mold bases, cutting tools, punches
- Automotive hardware: Brackets, fittings, exposed chassis parts
- Temporary protection: Steel parts in storage or shipping

Summary
HOMO treatment is a highly effective, clean, and dimensionally stable corrosion protection method for steel parts. By eliminating chemicals and preserving tolerances, it's ideal for industries demanding both environmental and performance excellence.

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